304 INVERTEBRATA OF MASSACHUSETTS. 



with enamel, which rises up by the side of an umbilical depres- 

 sion ; beak short, slightly curved ; throat of various hues from 

 light violet, to dark chocolate ; operculum horny, rounded ovate, 

 elements concentric ; the nucleus near one edge. Length 1 inch, 

 breadth f inch, divergence 50. 



Found on rocks in bays and inlets, about Nantucket, New Bed- 

 ford, &c., and occasionally sheltered under the edges of stones in 

 Boston harbour. I am not aware that it is found to the north of 

 Cape Ann, while it is common at the South, and grows to a much 

 larger size. 



Animal small, foot scarcely covering the aperture, very little 

 dilated at the front angles, cream-colored, margined with lemon- 

 color beneath, punctured with light drab above ; siphon merely 

 surpassing the tip of the canal ; head scarcely protruded ; tenta- 

 cula nearly united at origin ; eyes black, at the outer upper third 

 of tentacula, which third is a mere filament, contractile. Motions 

 sluggish. 



Mr. Say noticed that its habits were those of PU'RPURA ; but it is 

 removed from both Fusus and PU'RPURA by its operculum, and will 

 probably prove to belong to the genus PO'LLIA of Gray. Mr. Say's 

 specific name is pre-occupied by another species of BU'CCINUM. 



BU'CCINUM DONOVA'NI. 



Shell ovate-conic^ elevated and pointed ; whorls folded length- 

 wise, and marked with revolving lines ; the lowest whorl is encircled 

 by a rounded carina ; aperture rounded, lip spreading. 



FIGURE 208. 

 State Coll., No. 165. Soc. Cab., No. 2378. 



Buccinum glaciale, DONOVAN ; Brit. Shells, v. pi. 154. BROWN ; Conch, of Great 



Brit., fyc., pi. 49, f. 12, 13. 

 Buccinum Donovani, GRAV; in Zool. to Beechey's Voyage, 128. 



Shell ovate-conic, spire elevated and pointed, solid, of a livid 

 brownish-color, folded obliquely lengthwise, the lower whorl being 

 merely plaited at the suture, and covered with rather coarse re- 

 volving lines ; whorls seven or eight, moderately convex, and 



